Answer this question truthfully
### Question: What are the symptoms of Ondine's curse?
### Response: Symptoms are usually worse during sleep, and periods of apnea (episodes of stopped breathing) are usually present.
Often patients themselves do not complain of shortness of breath during the day.
Symptoms include:
Bluish coloration of the skin caused by lack of oxygen Daytime drowsiness Fatigue Lethargy Morning headaches Swelling of the ankles Waking up from sleep unrested Waking up many times at night
Persons with this disease are extremely sensitive to even small doses of sedatives or narcotics, which can make their already inadequate breathing much worse.